US PATENT SUBCLASS 367 / 28
.~.~ Amplitude measurement

Current as of: June, 1999
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367 /   HD   COMMUNICATIONS, ELECTRICAL: ACOUSTIC WAVE SYSTEMS AND DEVICES

14  DF  SEISMIC PROSPECTING {4}
25  DF  .~ Well logging {6}
28.~.~ Amplitude measurement {4}
29  DF  .~.~.~> Peak amplitude
30  DF  .~.~.~> Amplitude comparison
31  DF  .~.~.~> Of noncompressional acoustic wave energy
32  DF  .~.~.~> Frequency dependent determination

DEFINITION

Classification: 367/28

Amplitude measurement:

(under subclass 25) Subject matter wherein the detected acoustic wave is converted to an electric signal whose amplitude is used to determine some characteristic of the acoustic medium (i.e., earth).